NPT Thread forms

[Hayden]

Is there any place that I can find specific details of NPT thread forms? I'm in the UK so resources here are hard to find.

What I'm after is a chart of items such as;
taper angle, start core diameter, start outside diameter...... (I'm sure some of my terminology is out there).

Cheers

Hayden

 

[EdDanzer]

You should try to obtain a Machinery’s Handbook by Industrial press. But here are some sites that have some information:

http://www.parker.com/tfd/

http://www.fluidpowerdirectory.com/

 

[hiliter]

The CRANE Valve Engineering Data handbook has NPT thread information listed in a single page from sizes 1/16" to 24" OD.

It references ANSI Std. B2.1 at the bottom of the page.

 

[tc7]

ANSI B1.20.1 tells all you need to know about NPT thread geometry.

 

[Cockroach]

Yes, as per "tc7". I use ANSI B1.20.3-1976 which was reaffirmed in 1998. This is published by:

The American Society of Mechanical Engineers
United Engineering Center
345 East 47th Street
New York, NY USA 10017

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada